Call me a n00b who hasn't been reading the forums recently but I have noticed what seems to be a new mechanic: players will continue their runs until the turn is over, even if you haven't instructed them to do so. e.g. I run the ball to a 2-point zone and stop - in what I assume is a safe position. However on priming the play and watching it play out, the player actually continues his run past the 2-point zone "stopping point" and tries to make it to the endzone by the shortest route possible. In certain cases this has been beneficial (i.e. when the AI hasn't covered the endzone - yay) however in other cases it results in my player running straight into a tackle instead of stopping where I instructed him to. Is this part of the game now or is it a bug?

This is a difference in rules between SP and MP. In SP, a run must end in the endzone. (I would prefer to have this rule for MP as well in all honesty, but it's too unbalanced for O and not fun for D).

An actual rule change for MP is that the running turn ends when the ball carrier's plans end rather than after a specific time. (Well, if he has a very long plan it still ends after that time)